Fluid control device for electrical switch unit

Abstract

A control device, switch unit therefor and methods of making the same are provided, the electrical switch unit comprising a switch having a movable actuator, a lever pivotally carried by the switch unit and having one end adapted to be operatively interconnected to a movable part of a control device so as to be pivoted by the movement thereof, the lever being operatively interconnected to the actuator to operate the switch between the different conditions thereof in relation to the pivoted position of the lever, and a pair of mounting plates respectively having holding structure that hold the switch between the plates and respectively having pivot structure that pivotally mount the lever between the plates whereby the plates, the switch and the lever form a self-supporting switch unit.

What is claimed is: 
     
       1. In a control device comprising a housing means divided into two chambers by a movable wall means that is responsive to a pressure differential created between said chambers, an electrical switch means carried by said housing means and having a movable actuator, and a lever pivotally carried by said housing means and having opposed ends one of which is interconnected to said wall means so as to be pivoted by the movement thereof, said lever being operatively interconnected to said actuator to operate said switch means between the different conditions thereof in relation to the pivoted position of said lever, the improvement comprising a pair of mounting plate means respectively having holding means that holds said switch means between said plate means and respectively having pivot means that pivotally mount said lever between said plate means and between said opposed ends of said lever whereby said plate means, said switch means and said lever form a self-supporting unit that is carried by said housing means and has the other end of said lever acting on said actuator of said switch means, said housing means having an opening means therein, one of said plate means having an extension disposed in said opening means in said housing means and being secured therein so that said self-supporting unit is carried by said housing means. 
     
     
       2. A control device as set forth in claim 1 wherein said one end of said lever has an arcuate abutment thereon that engages said movable wall means. 
     
     
       3. A control device as set forth in claim 2 and comprising a range spring having one end bearing against said one end of said lever in a direction to tend to force said abutment against said movable wall means. 
     
     
       4. A control device as set forth in claim 1 wherein said switch means comprises a housing having opening means passing therethrough, said holding means of said plate means comprising post means extending therefrom and respectively being received in said opening means of said housing. 
     
     
       5. A control device as set forth in claim 1 wherein said lever has opening means passing therethrough, said pivot means of said plate means comprising post means extending therefrom and respectively being received in said opening means of said lever. 
     
     
       6. A control device as set forth in claim 1 wherein said opening means of said housing means comprises an elongated slot means, said extension of said one of said plate means being an elongated wedge-shaped structure disposed in said elongated slot means. 
     
     
       7. A control device as set forth in claim 1 and comprising a board means having electrical circuit means thereon, said switch means having terminal means extending therefrom and being operatively interconnected to said circuit means of said board means. 
     
     
       8. A control device as set forth in claim 7 wherein said board means has opening means passing therethrough, said terminal means of said switch means being received in said opening means of said board means. 
     
     
       9. A control device as set forth in claim 8 wherein said board means is disposed on one side of said switch means and said lever is disposed on the other side of said switch means.